feat: 统一全站设计风格、导航组件与文案逻辑自洽性修复

- 新增 InkGlowCard 墨韵流光卡片组件，统一全站卡片交互风格
- 新增 PageNav 面包屑组件，统一全站页面导航
- 统一色彩体系、排版层级、间距节奏和动画风格
- 修复 CTA 区品牌名称错误（诺瓦隆→睿新致遠）
- 修复 ERP 产品卖点与年费制定价矛盾
- 导航下拉补充 SDS 和 OA 产品
- 统一全站数据指标为 12+年核心团队经验、6自研产品、10+团队成员
- 移除不可靠的 100%客户满意度和 30+行业专家指标
- 修复新闻时间线不合理问题，调整里程碑节奏
- 统一响应承诺为工作日快速响应
- 服务第4项重命名为行业方案实施，厘清概念
- 服务详情页效果数据改为定性描述
- 删除 cases 模块，精简代码库

src/components/layout/mobile-tab-bar.tsx

@@ -1,55 +1,38 @@
 'use client';
 
-import { useState, useLayoutEffect, useRef } from 'react';
 import { StaticLink } from '@/components/ui/static-link';
-import { usePathname, useSearchParams } from 'next/navigation';
+import { usePathname } from 'next/navigation';
 import { Home, Briefcase, Package, FileText, User } from 'lucide-react';
 import { motion } from 'framer-motion';
 import { cn } from '@/lib/utils';
 
 const tabs = [
   { id: 'home', label: '首页', href: '/', icon: Home },
-  { id: 'services', label: '服务', href: '/#services', icon: Briefcase },
-  { id: 'products', label: '产品', href: '/#products', icon: Package },
-  { id: 'news', label: '新闻', href: '/#news', icon: FileText },
+  { id: 'services', label: '服务', href: '/services', icon: Briefcase },
+  { id: 'products', label: '产品', href: '/products', icon: Package },
+  { id: 'about', label: '关于', href: '/about', icon: FileText },
   { id: 'contact', label: '联系', href: '/contact', icon: User },
 ];
 
 export function MobileTabBar() {
   const pathname = usePathname();
-  const searchParams = useSearchParams();
-  const [hash, setHash] = useState('');
-  const isInitializedRef = useRef(false);
-
-  useLayoutEffect(() => {
-    if (!isInitializedRef.current) {
-      isInitializedRef.current = true;
-      setHash(window.location.hash.slice(1));
-    }
-    
-    const handleHashChange = () => {
-      setHash(window.location.hash.slice(1));
-    };
-    
-    window.addEventListener('hashchange', handleHashChange);
-    return () => window.removeEventListener('hashchange', handleHashChange);
-  }, []);
 
   const isActive = (_href: string, id: string) => {
+    if (id === 'home') {
+      return pathname === '/';
+    }
     if (id === 'contact') {
       return pathname === '/contact';
     }
-    
-    if (pathname === '/') {
-      const section = searchParams.get('section');
-      const currentSection = section || hash;
-      
-      if (id === 'home') {
-        return !currentSection || currentSection === 'home';
-      }
-      return currentSection === id;
+    if (id === 'products') {
+      return pathname === '/products' || pathname.startsWith('/products/');
+    }
+    if (id === 'services') {
+      return pathname === '/services' || pathname.startsWith('/services/');
+    }
+    if (id === 'about') {
+      return pathname === '/about';
     }
-    
     return false;
   };